Fuse-switch.



T. E. MURRAY 65 G. W. GHRI S TIANS.

FUSE SWITCH.

APPLICATION FILED NOV. 7, 1912.

Patented Feb. 24, 1914.

STATE orrio THOMAS E. MURRAY AND GEORGE w. onnis'rians, or new YORK, N. 522; SAID cnms'rmivs ASSIGNOR TO SAID MURRAY.

FUSE-SNITCH.

Application filed November 7, 1913.

Q '0 all "or/1.0112 it may concern:

lie it known that we, THOMAS E. Mommy and Grouch ll. CHRISTIANS, citizens of the lfnitcd States, residing at New York, in the county of New York and State of New York, have invented a certain new and useful Improvement in l aise-Switches, of whichthe following is a specification.

The invention is a fuse switch, in which a cartridge fuse case provided with a suitable handle forms the switch lever.. The fixed. part of the device comprises a socket,'in which are disposed a ring contact and, a llshaped contact projecting inwardly from one of the walls of the socket, to which contacts the circuit leads are com'lected. When it is desired to establish circuit througlrthe fuse, the fuse case is inserted into the socket so that a cap on one end. of the case enters and cooperates with the ring contact, and a cap on the other end of the case enters between and cooperates with the arms of the U contact. A spring suitably arranged within the ring contact and acting against one end face of the fuse case forces the opposite end face againstan abutment, prefer ably inturncd flanges on the U contact, thus holdingthe fuse case in its circuit-closing position. When the fuse is not in use, the fuse case and handle are removed from. the socket and may be left suspended therefrom by a suitable cord.

In the accompanying drawings-Figure 1 a longitudinal section of our fuse switch on line a, oz of Fig. 2'. Fig. 2 is an elevation, and Fig. 3 is a section. on the line 3 1 of Fig. 1.

Similar numbers of reference indicate like parts.

1 is a socket, preferably formed integrally of refractory insulating material, such as porcelain. The side walls 2, 2 of said socket may be parallel. The end Walls 3, l diverge outwardly, so that, as shown in Fig. l, a loiui itudinal section of .the socket recess taken through the end walls is substantially trusto-pyramldal in form. In the bottom or contracted end of said recess is fitted an an nular hollow frusto-pyramidal contact {tcrnwd hereafter for brevity ring con tact and secured in place by a screw 6. Fiaid screw also serves to hold a metal block b in a recess formed in a. projection 8 on the end wall 3 of the socket. 1n block 6 is an opening which receives the denuded end of I Specification of Letters Patent.

' atented llteh. 241;. fill t.

Serial No 799,657.

the circuit lead 10, said end being fastened .in said opening by the binding screws 1) which are inserted through openings in said pro ection 8. In a projection 11 on end wall t is a recess receiving a metal block 12 havmg an opening in which is clamped by means at the binding screws 13, the denuded end of circuit lead 14:. A portion of end wall 4; is cut away to permit of the insertion of screws '13. Within the socket and on the inner side of end wall 4.- is secured a U- shaped contact plate 15 by means of screw 10 which also enters and so holds in place the metal block 12. 'lln the'extremity of the socket'is a cylindrical recess, in which is seated the helical spring 17. The wall of said recess immediately adjacent to its bottom is grooved to receive the enlarged end turn of spring 17. in inserting the sprinf this turn is compressed to permit it. to pass through the recess, so that said turn eX ands upon'reaching the groov and sohol s the spring in said recess. e .ccr free end of the spring normally extends into the ring contact 5. w

18 isa end. caps fuse strip or wire (not shown) extending be tween said caps; To one cap 20 is attached by means of screw 21 or by any other convenient means an operating handle 22 of insulating material. As here shown, the

cartridge fuse case having metal screw 21 is inserted through a longitudinal bore' in the handle. The handle may have formed upon it a circular flange 23 forming a guard for the hand of the operator being.

to that end made of sul'licient width to form a barrier protecting the hand from contact with the block 1.2 when the switch is in the closed position shown in Fig. 2. The handle and fuse case attached thereto form a structure separate from the socket, but which may be conveniently attached thereto by means of a cord 24: connected at one end to an eye '25 on the handle and at the other end to an eye on a metal bar 26 pivoted in a lug -'27 on end wall 3 of the casing.

In using the device, the fuse case 18 which practically forms the switch lever is inserted in the socket, so that the cap 19 on the end thereof enters the rin contact 5, meets the protruding end of spring 17, and is pushed inward to compress said spring. The handle 22 is then swung to the right of Fig. 1, until the cap 20 enters between the arms 19, 20, and containing the usual said fuse of Uehaped contact 15 and above inwardly turned flanges 28 on the lowe edges of said arms. llhe resili ncy of :zspring' 17 hen forces the outer face can 20 against the flanges S28, and holds the fuse case in. place, closing circuit between the ring contact 5 and U Contact, after the he idle is released by the operator. By reversing this operation, the fuse case and handle may be wholly withdrawn from the socket, and, if desired, left suspended therefrom by cord We claim:

1. A fuse switch, comprising a socket, a contact at the bottom thereof, a contact on the inner side of one wall of said socket, a fuse case entering said socket, contacts on case cooperating with said socket contacts, iincans. for detachably retaining said use case in said cooperation, a handle of insulating material secured to an end of said fuse case, and a circumferential flange on said handle forming a. protective barrier between the hand of the operator and said contacts. p 1

2. A, fuse switch, comprising); a socket having" Walls diverging to the opening thereof, a ring contact at the bottom of said socket, U-sl1aped contact projecting inwardly from one of said diverging Walls, a fuse case on tering said socket, end contacts on said fuse case received respectively in said ring; con-- tact and between the arms of said lJ-shaped contact and coiiymrating with said socket contacts, and means for detachably retaining said fuse bane, tron.

A fuse switch, comprising a socket havoontacts in said ooopora menses ing walls diverging to the opening thereof, aring contact at the bottom of said socket, a spring supported within said ring contact, a U-shaped contact projecting inwardly from one of said diverging walls, an abutnient between said U-shdped contact and said socket opening, a fuse case entering said socket, and end contacts on saidffuse case; one of said end contacts being received in said ring contact and bearing upon said spring, and the other of said contacts being received between. the arms of said U-shaped contact and being held by the resiliency of said spring against said abutment.

4. A fuse switch, comprising asocket havin walls diverging to-the opening thereof, a ring contact at the bottom of said socket,

a spring supported Within said ring contact,

a U-shaped contact projecting from said divergingwalls' into said socket and having an inwardly turned flange on each of its arms, a fuse 'fcase entering said socket, and end contacts on said fuse case; one of said end contacts being receivedin said ring con tact and bearing upon said spring, and the other of saidend contacts being received be tween the ari ls of said U-shaped contact and being held by the resiliency of said spring against said flanges.

In signatlircs in presence of two Witnesses.

MlI-lOMAS MURRAY.

GEORGE W. CHRISTIANS.

l Vitnesses Gnirrnnon .T. PORTER, MAY T.- McGARnY,

testimony whereof we have afiixed our 

